Need help on a question.

Every MMORPG these days has an NPC. Sometimes NPC requires you to lets say hunt 10 of this item in return will reward you with something. Is there a way to trick/hack/CE/WPE so that you can keep on clicking exchange for the item? Like tricking the NPC into thinking you have submit the items but you have not. I hope anyone understands what im trying to explain here ._.

not possible in nearly all mmorpgs, because the qeust requirements are also checked server side and its also checked if you already have completed the quest, so that you cant repeat it

You could send the package you gathered from giving away the items. But I doubt any server these days doesn't check if you really have the items.